AiiPHIBIA.NS AfJD REPTILES; PREDATORS AilD PREY

AMPHIBIANS AND BIRDS by Willian-L E. Cook Columbia Greene Community College

BIBLIOGRAPHY OF HERPETOLOG ICAL REFERENCES

IN AUSTRALIAN ORNITHOLOGICAL JOURNALS r-sT^^^TViY) by Glenn M. Shea

SMITHSONIAN HERPETOLOGICAL INFORMATION SERVICE NO. 73 INTRODUCTION

This publication provides a reasonably extensive bibli- ography of the literature on predator/prey relationships among amphibians and birds. In addition, an index has been prepared that includes four lists which cross reference predator and prey species. This index enables one to quickly find the citations relating to particular amphibians or birds. The lists, which follow this introduction and precede the bibliography, are titled: Birds that Eat Amphibians, Amphibians Eaten by Birds, Amphibians that Eat Birds, and Birds Eaten by Amphibians.

The organisms are listed phylogene t ically in the first column of the index. The interacting species and references are listed in the second and third columns alphabetically by the author's name. A "-" in the index indicates the inability to determine the identity of a predator or prey species either due to the unavailability of an article or ambiguity in the article itself.

The importance of a reference to predator/prey studies is three-fold. Birds seem to be a major selective force in the evolution of some amphibians. An awareness of the details of the predator/prey relationship in these cases may help elucidate aspects of amphibian and even avian evolution. Secondly, in order to understand the ecological niche, of an animal one needs to be cognizant of its range of food items and its potential enemies. Furthermore, efforts to secure legislation to protect various species must, if possible, be based on sound knowledge, not only of the abundance of these species, but also on their importance to other species.

It is clear that the literature is most voluminous in the reporting of birds feeding on amphibians. 70% of the articles listed fall into this category. Surprisingly perhaps, 7% of the articles discuss cases of amphibians eating birds. Some of the selections deal with studies of mimicry or cryptic coloration in amphibians as defenses against predation by birds (e.g., Brodie, Matthews). The use of poisons as a defense strategy appears in the literature as early as 1392 by Boulenger. Behavioral defenses are reported by at least two authors (e.g., Ewert, Sazima) and the evolution of defense strategies is discussed by Wooley.

Predation by birds is asserted to influence the evolution of community organization among salamanders (Jaeger) as well as the breeding location of frogs (Roca). Techniques helpful in determining percent biomass in raptor diets (Steenhof) and raptor prey species abundance (Fitzner) are presented and VJendland shows hov; owl pellets can be used to study frog distribution. Finally, if anyone has ever doubted the commercial value of amphibians, Nair and Prabhu describe how frog wastes can be converted into little cakes to be used for chicken feed.

In the event that it would be desirable to elaborate on this inaugral compilation, I present the sources included thus far. The first few references were obtained from the text Biology of the Amphibians by Duellman and Trueb 1986 and from the files of Professor iMargaret M. Stewart. Two computer searches covering Biological Abstracts from 1975 to 1985 provided several more references. Copies of these articles were obtained and their bibliographies supplied further titles. The majority of the citations were, however, obtained by searching through the Zoological Record from 1864 to 1983.

I wish to thank Dr. Margaret M. Stewart of the State University of New York at Albany for her assistance and encouragement. Readers may send additions and corrections to William E. Cook, Columbia-Greene Community College, Box 1000, Hudson, New York 12534. INDICES

BIRDS THAT EAT AMPHIBIANS

PREDATOR PREY REFERENCE

Tachybaptus ruficollis "tadpole" Collinge Podiceps grisegena "frog" Collinge Pelecanus ery throrhynchos "salamanders" Sidle Phalacrocorax carbo Rana teraporaria Ponting Phalacrocorax auritus "frog" Ponting

Botaurus stellaris . " frog" Collinge Ixobrychus minutus "frog" Collinge Ardeola cinerea " tadpole" Collinge "far-eastern tree frog' Korotov Ardeola grayii Rana tigerina or Sarker Bufo melanostictus Bubulcus ibis Rana tigerina or Sarker Bufo melanostictus Siegfried Ciconia ciconia Rana sp. Rekas i Cygnus olor "frog" Collinge Anas platyrhynchos " frog" Collinge Bufo americanus Mueller(1980 Anas acuta " frog" Collinge Anas clypeata " frog" Collinge Anas strepera " frog" Collinge Aythya ferina "frog" Collinge Aythya fuligula "frog" Collinge Mergus albellus "frog" Collinge Milvus migrans " frog" Andrews Rana tigerina or Sarker Bufo melanostictus Haliastur indus Rana tigerina or Sarkur Bufo melanostictus Spilornis cheela Rana tigerina or Sarker Bufo melanostictus Geranospiza caerulescens Fritziana goeldii Bokerman "small vertebrates" Jehl Circus aeruginosus Litoria aurea Baker-Gabb "frog" Collinge Circus cyaneus "frog" Collinge Bufo americanus Miller Circus pygargus "frog" Collinge Accipiter nisus " frog" Collinge Accipiter cooperii Bufo americanus Miller Buteogallus urubitinga Bufo marinus Beebe Bufo guttatus Buteo lineatus Bufo americanus Miller Buteo platypterus Bufo americanus Miller Bufo americanus Rosenf ield Rana sylvatica Rusch Buteo swainsoni Scaphiopus bombifrons Sexton Buteo jamaicensis Bufo americanus Miller Buteo buteo " frog" Collinge Rana temporaria Maguire Bombina borabina Zsolt Bufo bufo Bufo viridis Rana ridibunda Buteo regalis Rana pipiens Blair Aquila rapax Osborne Falco tinnunculus " frog" Collinge Falco sparverius Rana aurora Collopy(1983) Hyla regilla Falco vespertinus Rana arvalis Pererva Falco colurabarius Rana temporaria Rebecca Falco peregrinus "frog" Collinge Rana sp. Lindberg Falco rusticolus Rana sp. Lindberg Dendragapus canadensis Rana septentrional is Applegate Bonasa umbellus Bufo americanus Hale Rana sp. Gallus gallus Desmognathus ochrophaeu s Brandon( 1979) Salamandra salamandra Horter Desmognathus spp. Howard(1971) Desmognathus sp. Howard(1973) Plethodon cinereus Notophthalmus viridesce ns " Gyrinophilus porphyriti cus " Desmognathus ochrophaeu s Labanick Plethodon sp. Bufo americanus Miller Gallinula chloropus "tadpole" Collinge Grus canadensis Amphiuma sp. Dye Charadrius vociferus " frog" Schardien Himantopus himantopus Pleurodeles waltl Vermot Tringa totanus "frog" Collinge Tringa nebularia " frog" Collinge Rana sp. Taylor Actitis hypoleucos " tadpole" Collinge Numenius arquata " frog" Collinge Burhinus oedicnemus " frog" Collinge Larus canus Rana temporaria Ritchie Larus argentatus Rana temporaria Helle

Chlidonias hybrida • Hyperolius horstockii Craig Chlidonias niger " frog" Collinge Cuculus canorus Bufo bufo McDougall Rana temporaria Geococcyx calif ornianus Parmley Tyto alba Bowman "frog" Cuisin Rana temporaria Fairley Palobates fuscus Marian Rana sp. Muselet f )

Tyto albo Ruprecht Valente Otus asio Bufo americanus Miller "salamander" Rising Bubo virginianus Ambystoma tigrinum Holman Bubo bubo Rana temporaria Schaef fer Athene noctura "frog" Collinge Athene cunicularia Scaphiopus intermontanus Gleason Ambystoma tigrinum Tyler Scaphiopus couchi Scaphiopus bombifrons Rana pipiens Strix aluco Betts Rana sp. Bozsko " frog" Collinge Delmee "amphibians" Nilsson Pelobates fuscus Wendland Strix uralensis "amphibia spp." Lundberg Strix nebulosa Rana spp. Mikkola Ceryle alcyon Rana sylvatica Seale Alcedo atthis "tadpole" Collinge Perisoreus canadensis Bufo boreas Beiswenger Pseudacris triseriata Matthews Pseudacris triseriata Tordof Cyanocitta cristata Desmognathus ochrophaeus Howard(1973) Garrulus glandarius " frog" Collinge , Corvus monedula "tadpole" " frog" Collinge , Corvus frugilegus " tadpole" "frog" Collinge Corvus brachyrhynchos Bufo americanus Miller , Corvus corone corone "tadpole" " frog" Collinge , Corvus corone cornix "tadpole" " frog" Collinge Corvus corax "frog" Collinge Troglodytes troglodytes Ranidae Czikeli , Cinclus cinclus "tadpole" " frog" Collinge Turdus merula "tadpole" Collinge Rana temporaria Evans Turdus migratorius Plethodon jordani Brandon( 1975 Pseudacris triseriata Matthews Toxostoma rufum Desmognathus sp. Howard(1973) Desmognathus sp. Jaeger Plethodon cinereus Lanius excubitor " frog" Collinge Rana temporaria Halliday Pipilo erythropthalmus Desmognathus sp. Jaeger Plethodon cinereus Quiscalus quiscula Rana pipiens Ernst Ploceus philippinus Rana limnocharis George ) )

AMPHIBIANS EATEN BY BIRDS

PREDATOR REFERENCE

Amphiuma sp. Grus canadensis Dye Notophthalmus viridescens Callus gallus Howard "ducks" Pope Pleurodeles waltl Himantopus himantopus Vermot Salamandra salamandra "chic kens, ducks" Horter Ambystoma tigrinum Bubo virginianus Holman Athene cunicularia Tyler Desmognathus montacola Gallus gallus Howard(1971) Desmognathus ochrophaeus Gallus gallus Brandon( 1979 "birds" Brodie(1980) Cyanocitta cristata Howard(1973) Gallus gallus Labanick Desmognathus quadramaculatus Gallus gallus Howard(1971) Gyrinophilus porphyr it icus Gallus gallus Howard(1973) Plethodon cinereus "birds" Brodie(1980) Pipilo erythrophthalmus Jaeger Toxostoma rufurn Tilley Bombina bombina Buteo buteo Zsolt Xenopus muelleri "stork" Loveridge Pelobates fuscus Tyto alba Marion Strix aluco Wendland Scaphiopus bombifrons Buteo swainsoni Sexton Athene cunicularia Tyler Scaphiopus couchi Athene cunicularia Tyler Scaphiopus holbrooki "gulls" Pearson Scaphiopus intermontanus Athene cunicularia Gleason Bufo americanus Bonasa umbellus Hale Circus cyaneus Miller Accipiter cooperii Buteo lineatus Buteo platypterus Buteo jamaicensis Anas platyrhynchos Mueller(1980) Buteo platypterus Rosenf ield Bufo boreas Peisoreus canadensis Beiswenger Bufo bufo Falconif orraes Amores Strigiformes

Cuculus canorus McDougall { 1981 Buteo buteo Zsolt Bufo guttatus Buteogallus urubitinga Beebe Bufo marinus Buteogallus urubitinga Beebe Bufo melanostictus Barker Bufo viridis Buteo buteo Zsolt Brachycephalus ephippium Carvalho Litoria aurea Circus aeruginosus Baker-Gabb Fritziana goeldii Geranospiza caerulescens Bokerman Acris crepitans Nevo Acris gryllus Nevo Hyla regilla Falco sparverius Collopy(1983) Pseudacris triseriata Perisoreus canadensis Matthews Turdus migratorius Perisoreus canadensis Tordoff Rana arvalis Falco vespertinus Pererva Rana aurora Falco sparverius Collopy Rana limnocharis Ploceus philippinus George Rana pipiens Buteo regalis Blair Quiscalus quiscula Ernst Athene cunicularia Tyler Rana ridibunda Buteo buteo Zsolt Rana septentrionalis Dendragapus canadensis Applegate Rana sylvatica Buteo platypterus Rosenf ield Ceryle alcyon Seale Rana temporaria Turdus merula Evans Tyto alba Fairley Lanius excubitor Halliday Larus argentatus Helle Buteo buteo Maguire Cuculus canorus McDougall(1981) Phalacrocorax carbo Ponting Falco columbarius Rebecca Larus canus Ritchie Bubo bubo Schaef f er Schiebe Rana tigerina Sarker Hyperolius horstockii Chlidonias hybrida Craig

AMPHIBIANS THAT EAT BIRDS

PREDATOR PREY REFERENCE

Bufo americanus Agelaius phoeniceus Cook Bufo marinus "ducklings" Cook Pyxicephalus adspersus Callus gallus Branch "small birds" Wager Rana catesbeiana "probably" Passer domesticus Cochran Frost Bombycilla cedrorum Gollob "ducklings" Hewett Howard, W. Rana esculenta Regulus regulus Rab^l Rana pipiens Archilochus colubris Norris-Elye Dendroica petechia " Rana ridibunda Phylloscopus bonelli Belman Motacilla flava " "small birds" Hellmich Rana temporaria Phylloscopus trochilus Svensson Rana tigerina "sparrow" Deshpande Gallus gallus Dharmaraju BIRDS EATEN BY AMPHIBIANS

PREY PREDATOR REFERENCE

Gallus gallus Pyxicephalus adspersus Branch Rana tigerina Dharmaraju Archilochus colubris Rana pipiens Norris-Elye Phylloscopus trochilus Rana temporaria Svensson Phylloscopus bonelli Rana ridibunda Belman Regulus regulus Rana esculenta Rab?5l Motacilla flava Rana ridibunda Belman Bombycilla cedrorum Rana catesbeiana Gollob Dendroica petechia Rana pipiens Norris-Elye Agelaius phoeniceus Bufo americanus Cook .

BIBLIOGRAPHY

Amores, F., A. Franco, and J. Mellado. 1980 (1979). Presencia de Buf o buf o spinosus Daudin en la dieta de Falconiforraes y StrigiEormes en Sierra Morena

occidental. DofPfana Acta vert. 6 { 2 ) : 238-239 . Anderson, S., and P.W. Ogilvie. 1957. Vertebrates found in owl-pellets from northeastern Chihuahua. Southwest Natur. 2:33-37. Andrews, N.E. 1978. Yellow-billed kites taking frogs from water. Honeyguide 93:42. Applegate, R.D. 1978. Spruce grouse feeds on mink frog. Loon 10(4) :207.

Baker-Gabb, D.J. 1981. The diet of the Australian harrier Circus approximans in the Manawatu Rangitikei sand

country New Zealand. Notornis 28 ( 4 ): 241-254 . Beebe, W. 1925. Studies of a tropical jungle. Zoologica 6(1) :152. Beiswenger, R.E. 1981. Predation by gray jays on

aggregating tadpoles of the boreal toad ( Bufo boreas ) Copeia 1981:459-460. Belman, P.J., and P.A.I. Eddings. 1980. Marsh frogs seizing bonelli's warbler and yellow wagtail. British Birds 73(9) :418-419. Bent, A.C. 1964. Life Histories of North American Crows and Titmice. Dover Press; New York. Bent, A.C. 1964. Life Histories of North American Nuthatches, Wrens, Thrashers and Their Allies. Dover Press; New York. Berdan, D. 1976. Autecology and predatory behavior of a male kestrel in northern California. M.Sc. Thesis, Humboldt State Univ. Betts, E. St.G. 1927. Tawny owls and batrachian food. British Birds 21:41-43. Blair, C.L., and F. Schitoskey Jr. 1982. Breeding biology and diet of the ferruginous hawk in South Dakota. Wilson Bull. 94(l):46-54. Bokerman, W.C.A. 1978. Observacoes sobre habitos alimentares do gaviao Geranospiza caerulescens

(Vieillot , 1817 ) ( Aves, Accipitridae) . Rev. Brasil. Biol. 38:715-720. Boulenger, G.A. 1892. The poisonous secretions of batrachians. Natural Science 1:185-190. Bowman, N. 1980. The food of barn owls Tyto alba at a long used Pembrokeshire site Wales U.K. Natur. Wales 17(2): 106-108. Bowman, N. 1980. The food of the barn owl Tyto alba in mid Wales U.K. Nat. Wales 17{2):84-88. Bozsko, S.I. 1967. Die Brut und die Nahrung des Turmfaeteus der Waldohreule und des Waldkauzes in den Parkaulagen der Umgebung von Leningrad. Aquila 73-74:121-132. Branch W.R. 1976. Two exceptional food records for the African bullfrog Pyxicephalus adspersus . J. Herpetol. 10(3) :266-268. . ., . 10

Brandon, R.A., and J.E. Huheey. 1975. Diurnal activity, avian predation and the question of warning coloration and cryptic coloration in salamanders. Herpetolog ica 31(3) :252-255. Brandon, R.A., G.M. Labanick, and J.E. Huheey. 1979. Learned avoidance of brown efts, Notophthalmus viridescens louisianensis (Amphibia ,Urodela

Salamandridae) , by chickens. J. Herpetol. 13:171-176. Broadley, D.G. 1974. Predation by birds on reptiles and amphibians in south-eastern Africa. Honeyguide 78:11-19. Broadley, D.G. 1974. Predation on birds by reptiles and amphibians in south-eastern Africa. Honeyguide 76:19-21. Brodie, E.D., Jr., and E.D. Brodie III. 1980. Differential avoidance of mimetic salamanders by free-ranging birds. Science 208:181-183. Brodie, E.D., Jr. and R.R. Howard. 1973. Experimental study of batsian mimicry in the salamanders Plethodon jordani

and Desmognathus ochrophaeus . Amer. Midi. Nat. 60:38-46.

Brooks, G.R. , Jr. r564. An analysis of the food habits of

the bullfrog, Rana catesbeiana , by body size, sex, month, and habitat. Virginia J. Sci. 15:173-186. Brown, L.H. 1963. Observations on east African birds of prey. East African Wildl. J. 1:5-17. Bury, R.B. 1971. Small mammals and other prey in the diet

of the pacific giant salamander ( Dicamptodon ensatus )

Amer. Midi. Natur. 87 ( 2 ): 524-526

Carvalho, A.L. 1940. Observacoes sobre casos de batracofagia

entre as aves^. Mems . Inst. Oswaldo Cruz 35:575-576. Cochran, P. A., and" E.M. Goolish. 1980. Bullfrog eats bird revisited. Bull. Chicago Herpetol. Soc. 15(3) :81. Collinge, W.E. 1939. Wild birds feeding on tadpoles and young frogs. N.W. Naturalist 14:129. Collopy, M.W., and J.R. Koplin. 1983. Diet capture success and mode of hunting by female American kestrels Falco

sparver ius in winter. Condor 85 ( 3 ): 369-371

Cook , F.R. , and J.C. Cook. 1981. Attempted avian predation

by a Canadian toad, Bufo americanus . Canadian Fid. Nat. 95(3) :346-347. Craig, A. 1974. Whiskered terns feeding on arum frogs. Ostrich 45(2) :142. Crump, M.L. 1977. The many ways to beget a frog. Nat. Hist. 86(l):38-45. Cuisin, J., and M. Cuisin. 1979. Le regime alimentaire de la

chouette effraye ( Ty to alba (Scopoli)) dans le canton des Riceys (Aube) et ses environs imm^diates. Oiseau 49(2): 81-89. Czikeli, H. 1976 (1975). Frosche als Nahrung des Zaunkbnigs

( Troglodytes troglodytes ) . Egretta 18(1):23.

Delmee, E., P. Dachy, and P. Simon. 1979. Comparitive study of a feeding regime of a forest population of tawny owls

Strix aluco . Gerfault 69(i):45-78.

Deshpande, D.S. 1935. A report of a bull-frog ( Rana tigrina ) devouring a sparrow. Proc. Indian Sci. Congr. 22:321-322. . . 11

Dharmaraju, E. 1960. The bull frog ( Rana tigrina ) as a

predator of poultry. J. Bombay Natur. Hist. Soc . 57: 423-424. Dye, R.L. 1982. Sandhill cranes prey on amphibians. Florida Fid. Natur. 10{4):76.

Ernst, S.G. 1944. Observation on the food of the bronzed grackle. Auk 61:644-645. Evans, M. 1982. Odd behavior of blackbirds. Annual Rep. Warwick Matur. Hist. Soc. No. 28:23-24. Ewert, J. -P., and R. Traud. 1979. Releasing stimuli for antipredator behavior in the common toad Bufo bufo (L.).

Behavior 68 ( 1-2 ): 170-180

Fairley, J.S., and F.L. Clark. 1972. Food of barn owls Tyto alba (Scopoli) over one year at roost in Co. Galway.

IrTs"h Natur. J. 17 ( 7 ): 219-222 . Fitzner, R.E., L.E. Rogers, and D.W. Uresk. 1977. Techniques useful for determining raptor prey-species abundance. Raptor Res. 11(3) :67-71. Frost, S.W. 1935. The food of Rana catesbeiana Shaw. Copeia 1935:15-13.

George, N.J. 1974 (1973). Baya ( Ploceus philippinus ) feeding

on frogs. J. Bombay Natur. Hist. Soc. 70 ( 2 ): 381-382 Gleason, R.L., and T.H. Craig. 1979. Food habits of burrowing owls in southeastern Idaho. Great Basin Natur. 39(3) :274-276. Gollob, T. 1978. Bullfrogs preying on cedar waxwings. Herpetol. Rev. 9(2(:47-48.

Hale, J.B., and R.F. Wendt. 1951. Amphibians and snakes as ruffed grouse food. Wilson Bull. 63:200-201. Halliday, K.C.R. 1970. Notes on a great grey shrike wintering in Lanarkshire. Scott. Birds. 6:22-23. Helle, E. 1975. Sammakot harmaalokin ravintona. Orris Fenn. 52(l):32-33. Hellmich. 1972. Reptiles and Amphibians of Europe. Intl. Pubns. Serv.; New York. Hewitt, O.H. 1950. The bullfrog as a predator on ducklings. J. Wildl. Management 14:244.

Holman, J. A. 1976. Owl predation on Ambystoma tigrinum . Herpetol. Rev. 7(3):114. Horter, M., and H. Greven. 1981. The relative edibility of juvenile fire salamanders Salamandra salamandra Amphibia Urodela. Amphib. Reptilia 2(l):15-22. Howard, R.R., and E.D. Brodie Jr. 1970. A mimetic relationship in salamanders: Notophthalmus vir idescens

and Pseudotriton ruber . Amer. Zool. 10:475. Howard, R.R., and E.D. Brodie Jr. 1971. Experimental study of mimicry in salamanders involving Notophthalmus

vir idescens and Pseudotriton ruber schencki . Nature 233:277. . . , . . . 12

Howard, R.R., and E.D. Brodie Jr. 1973. A batesian mimetic complex in salamanders: responses of avian predators. Herpetologica 29:525-527. Howard, W.E. 1950. Birds as bullfrog food. Copeia 150:152. Hurlbert, S.H. 1970. Predator responses to the

vermilion-spotted newt ( Notophthalmus viridescens )

J. Herpetol. 4 ( 1-2 ) : 47-55

Jaeger, R.G. 1981. Birds as inefficient predators on terrestrial salamanders. Amer. Natur. 117:835-837.

Jehl, J. Jr. 1968. Foraging behavior of Geranospiza nigra ,

the blackish crane-hawk. Auk 85 ( 3 ): 493-494 Jenkins, R.E. 1970. Food habits of wintering sparrow hawks in Costa Rica. Wilson Bull. 82:97-98. Jenni, D.A. 1969. A study of the ecology of four species of herons during the breeding season at Lake Alice, Alachua County, Florida. Ecol. Monogr. 39:245-270.

Keran, D. 1978. Nest site selection by the broad-winged hawk in north central Minnesota and Wisconsin. Raptor Res. 12:15-20. Knolle, F. 1981. Bemerkungen uber Amphibien und Reptilien. Vogelkundliche Ber. Niedersachs. 13(2):61-63. Kochan, W. 1979. Composition of food in birds of prey and

owls. Acta. Zool. Cracov. 23 ( 10 ) : 21 3-246 Korotkov, YU.M. 1979. Some data on the ecology of the far-eastern tree frog in Primorski Krai Russian SFSR USSR. Ekologiya 0(3):95-96. Kraus, A. 1977. Froschlurchnachweise durch Gewollanalysen Falke 24(5) :176.

Labanick, G.M. 1979. Comparative aspects of the life histories of mimetic and non-mimetic salamanders of the Desmognathus ochrophaeus complex (Amphibia, Urodela).

Dissertation Abstr. int. ( B) 39 ( 10 ) : 4770 Labanick, G.M., and R.A. Brandon. 1981. An experimental study of batesian mimicry between the salamanders

Plethodon jordani and Desmognathus ochrophaeus . J. Herpetol. 15(3) :275-281. Lindberg, P. 1981. Uncommon kinds of prey in nests of

Falco rusticolu s and Falco peregrinus . Var Fagelvarld ToTTTiiTT^ Loveridge, A. 1953. Amphibians from Nyasaland and Tete. Bull. Mus. Comp. Zool. Harv. 110:325-406. Lundberg, A. 1981. Population ecology of the Ural owl Strix uralensis in central Sweden. Ornis. Scand. 12(2): 111-119.

Maguire, E.J. 1979. Notes on the breeding of the buzzard in Kintyre. Western Natur. 8:3-13. Marian, M., and 0. Marian. 1973. Anuren-Knochenreste aus Eulengewollen. Vertebrata Hung. 14:9-19. . . .

13

Matthews, T.C. 1971. Genetic changes in a population of boreal chorus frogs polymorphic for color. Amer. Midi. Natur. 85:203-221. McDougall, D. 1981. Young Cuckoo's interesting food. J.

Edin. Natur. Hist. Soc . 1931:26-27. McDougall, D. 1983. Cuckoo eating young amphibians.

Scottish Birds. 12 ( 5 ): 162-163 Mikkola, H., and S. Sulkava. 1970. Food of great grey owls in Fenno-scandia. British Birds 63:23. Miles, P.M. 1958. Indigestibility of the eggs of the common

frog ( Rana temporaria ) to the common heron ( Ardea c.

cinerea ) . Nature in Wales 3:426-428.

Miller, N. 1909. The American toad ( Bufo lentiginosus

amer icanus , Le Conte): A study in dynamic biology. Amer. Natur. 43:641-668,730-745. Mosher, J. A., and P.F. Matray. 1974. Size dimorphism: a factor in energy savings for broad-winged hawks. Auk 91:325-341. Mueller, H.C. 1975. Hawks select odd prey. Science 188(4191) :953-954. Mueller, N.S. 1980. Mallards Anas platyrhynchos capture and eat American toads Bufo americanus . Wilson Bull. 94(4) :523-524. Mukherjee, A.K. 1969. Food-habits of water-birds of the Jundargans, 24-Parganas District, West Bengal, India. J. Bombay Nat. Hist. Soc. 66:345-360. Mukherjee, A.K. 1971. Food habits of water-birds of the Sundarban, 24-Parganas District, West Bengal, India. J. Bombay Nat. Hist. Soc. 68:37-64.

Muselet, D. 1982. Les proies de la clouette effraie ( Tyto Menestreau-en-Villette alba ) de deux communes du Loir et Naturalistes Orlean 1(3):181-190.

Nair. A.L., and P.V. Prabhu. 1980. Utilization of frog waste. Fish Technol. 17(l):27-30. Trophical (sic) Nechaev, V.A. , and YU . M . Korotkou. 1972. connections of birds with amphibians and reptiles in Primorye and Amur Territories. Vestnik Zool. 1972(6) :49-53. Nevo, E. 1973. Adaptive color polymorphism in cricket frogs. Evolution 27:353-367. Nilsson, I.N. 1984. Prey weight food overlap and reproductive output of potentially competing long-eared owls Asio otus and tawny owls Strix aluco . Ornis Scan. 15(3) :176-182. Norris-Elye. L.S.T. 1944. Leopard frogs devouring small birds. Auk 61:643-644.

Osborne, T.O. 1982. Observations on the tawny eagle Aquila

( : 107-1 11 rapax in southern Zambia. Ostrich 53 2 )

Parmley, D. 1982. Food items of roadrunners from Palo Pinto County, north central Texas. Texas J. Sci. 34(l):94-95. Pearson, P.G. 1955. Population ecology of the spadefoot toad, Scaphiopus h. holbrooki (Harlan). Ecol. Monogr. 25(3) :233-267. . . . 14

Pererva, V.I. 1981. Unusual case of individual selection of

prey by the red-footed falcon ( Falco vespertinus ) Ornitologiya 16:180. Ponting, E.D. 1967. Cormorant eating frog. British Birds 60:482.

Pope, P.H. 1928. The life history of Triturus viridescens . Copeia 168:61-73.

RabizJl, J. 1978. Goldcrests Regulus regulus killed by edible

frogs Rana esculenta . Brittish Birds 71:85. Rebecca, CW"! 1982. Merlin apparently preying on common frog. Scottish Birds 12(3):89. Rekasi, J. 1980. Uber die Nahrung des Weissstorchs

( Ciconia ciconia ) in der Batschka ( Sud-Ungarn ) .

Ornithologische Mitt., Gottingen 32 ( 6 ) : 154-1 55 . Rising, J.D., and F.W. Schueler. 1980. Screech owl eats fish and salamander in winter. Wilson Bull. 92(2): 250-251. Ritchie, J. 1926. A curious food supply of the common gull. common gull feeding upon frogs. Scotland Natur. 1926:22-23. Roca, R.L. 1982. Estrategias reproductivas y sucesion temporal de una comunidad de anuros (Amphibia: Salientia) en los llanos Venezolanos (estado apure). Thesis Universidad Simon Bolivar:149. Rosenfield, R.N., and M.W. Gratson. 1984. Food brought by broad-winged hawks Buteo platypterus to a Wisconsin USA

nest. J. Field Ornithology 55 ( 2 ): 246-247 Ross, A. 1969. Ecological aspects of the food habits of insectivorous screech-owls. Proc. West. Fdn. Vert. Zool. 1:301-344. Ruprecht, A.L. 1979. Food of the barn owl Tyto alba guttata from Kujawy Poland. Acta. Ornithol. 16(19) :49 3-5TT: Rusch, D.H., and P. Doerr. 1972. Broad-winged hawk nesting and food habits. Auk 89:139-145.

Sarker, S.U. 1983. Food and feeding habits of some birds of

Pabna Bangladesh. J. Asiatic Soc . Bangladesh 9(l):25-38 Sazima, I. 1978. Convergent defense behavior of two leaf-litter frogs in southeastern Brasil. Biotropica 10:158.

Schaeffer, H. 1970. Womit Ernahrt der Uhu ( Bubo bubo ) in Lapplan seine Jungen? Bonn. Zool. Beitr. 21:52-62. Schardien, B.J., and J. A. Jackson. 1982. Killdeers feeding on frogs. Wilson Bull. 94(l):85-87.

Schiebe, A. 1975. Grasfrosch ( Rana temporaria ) frisst

Jungvogel. Gefiederte Welt 96 ( 12 ): 242-243 Schwalm, P. A., P.H. Starrett, and R.W. McDiarmid. 1977. Infrared reflectance in leaf-sitting neotropical frogs. Science 196:1225-1227. Seale, Dianne B. 1982. Physical factors influencing oviposition by the wood frog, Rana. svlvatica in Pennsylvania. Copeia 1982( 3) :627-63T; . , 15

Sexton, O.J., and K.R. Marion. 1974. Probable predation by Swainson's hawks on swimming spadefoot toads. Wilson Bull. 86(2) :167-168

Sidle, J.G., W.H. Koonz, and K. Roney . 1935. Status of the American white pelican: an update. Amer. Birds 39(5): 859-864. Siegfried, W.R. 1971. The food of the cattle egret. J. Appl. Ecol. 8:447-468. Steenhof, K. 1983. Prey weights for computing percent biomass in raptor diets. Raptor Res. 17(l):15-27.

Svensson, S. 1983. A common frog, Rana temporaria , consumed a nestling of willow warbler, PhylToscopus

trochilus . Var Fagelvarld 42(5):347.

Taylor, D.W. 1976. Greenshank eating large frog. British Birds 69(10) :409. Tilley, S.G., B.L. Lundrigan, and L.P. Bower. 1982. Erythrism and mimicry in the salamander Plethodon

cinereus . Herpetologica 38 ( 3 ): 409-417 Tordoff, W. III. 1980. Selective predation of gray jays, Perisoreus canadensis, upon boreal chorus frogs,

Pseudacris triseriata. Evolution 34 ( 5 ): 1004-1008 . Tyler, J.D. 1983. Notes on burrowing owl Athene cunicularia food habits in Oklahoma USA. Southwest Natur. 28(1) :100-102.

Valente, A. 1981. Vertebrate remains in pellets of the barn owl Tyto alba from Planet Downs Station southwestern Queensland Australia. Aust. Wildl. Res. 8(1) :181-186. Vermot, M. 1980. Capture et ingurgitation d'un vertebre par une enchasse blanche, Himantopus himantopus . Nos Oiseaux 35(6) :289. Vernon, C.J. 1972. An analysis of owl pellets collected

in southern Africa. Ostrich 43 ( 2 ): 109-124 Vorbiev, K.A. 1966. Frogs attack birds. Priroda 1966:81.

Weger, V.A. 1965. The Frogs of South Africa. Purnell; Cape Town. Wendland, V. 1967. Die Knoblauchkrote (Pelobates fuscus) in Berlin und Umegbung. Milu 2:332-339. Woolley, H.P. 1982. Evolution of defense strategies among three species of sympatric salamanders. Dissertation Abstr. Int. (B)42(ll) :4295.

Yalden, D.W. , and R. Jones. 1970. The food of suburban tawny owls. Natrualist, Hull, No. 914:87-90.

Zsolt, K. 1982. Data on the feeding of the buzzard Buteo

buteo, Allattani. Kozl. 69 ( 1-4 ): 111-1 18 .